package book;

public class BookList {
    private Book[] books = new Book[10];//书架大小

    private int usedSize;//数组中放了多少本书

    //构造方法默认定义，所以不需要传参
    public BookList() {
        books[0] = new Book("三国演义", "罗贯中", 90, "小说");
        //this.books = books;
        books[1] = new Book("西游记", "吴承恩", 78, "小说");
        books[2] = new Book("红楼梦", "曹雪芹", 89, "小说");
        this.usedSize = 3;
    }

    /**
     * 获取当前数组的元素的个数
     * @return
     */
    public int getUsedSize() {
        return usedSize;
    }

    /**
     * 修改当前数组的元素的个数
     * @param usedSize
     */
    public void setUsedSize(int usedSize) {
        this.usedSize = usedSize;
    }

    /**
     * 获取pos下标的书
     * @param pos
     * @return
     */
    public Book getPos(int pos){
        return books[pos];
    }

    /**
     * 给数组pos位置放一本书
     * @param pos
     * @param book
     */
    public void setBooks(int pos, Book book){
        books[pos] = book;
    }
}
